At its March meeting in Palm Springs, CA, the Telecommunications Industry Association's TR-42 committee agreed to publish TIA/EIA-568-B.1 and B.2. These much-awaited standards cover commercial buildin...
May 1, 2001
At its March meeting in Palm Springs, CA, the Telecommunications Industry Association’s TR-42 committee agreed to publish TIA/EIA-568-B.1 and B.2. These much-awaited standards cover commercial building cabling. B.1 deals with general requirements; B.2 focuses on copper components. The B.1 standard had been held up, pending approval for the related B.2 standard. By the time this article appears they should be published, says Bob Jensen, vice-chair of TR-42
While that is the most visible thing TR-42 has done lately, committee members have a lot more on their plates.
At the March meeting, the committee finished resolving ballot issues on Category 6, the standard for twisted-pair cabling. The task group met in late March, after the TR-42 committee, for a lab review of Category 6; once the results were incorporated in the draft, it was to go to a TIA ballot. The standard might be approved as early as November, says Jensen, though early 2002 is more likely.
The committee also reviewed the draft of a new standard on building automation systems cabling, known as PN-4655. It decided on several items to be added, and gave approval for PN-4655 to go to its first industry ballot once those additions are made.
The committee has set up a task group to look into standards for first mile/last mile cabling — the links between a customer’s premises and the telephone carrier’s central office. This group will work with the 802.3 committee of the Institute of Electrical and Electronics Engineers (IEEE), which is also studying the issue.
Another task group will investigate bonding and grounding of shielded cabling and bring a draft addendum to TR-42’s June meeting for a vote.
The TR-42.7 subcommittee brought in a proposal to send an addendum on minimum bend radius for patch cable to industry ballot. Amendments are to be completed in time for the June meeting.
Another addendum to the TIA/EIA-568-B.3 standard, dealing with laser-optimized 50/125-micron cabling, will probably be approved in June or August. An addendum on multi-tenant pathways and spaces should be approved in June.
The committee is also looking into problems with electrostatic buildup on twisted-pair cabling, following up on an IEEE request.
TR-42’s activities are not limited to cabling for commercial buildings. TR-42 subcommittees also concern themselves with home wiring standards, and current projects include work on cabling for security, controls and audio for home theatre systems.
TR-42 meets again in mid-June in Providence, RI.